Super-heating does not have a dramatic effect on solubility, as you could remember that boiling point are not fixed. Water boils at 100 C at 1 atm yet it easily goes to 120 in a household pressure cooker, and while doing so it is better at dissolving stuff although the added pressure goes against the effect.

For super-heating at normal pressures... this is not an easy experiment as the dissolving matter will be a nucleation center for solvent boiling and super-heating will be hard to achieve.

Btw in all the above, I assumed solid materials and not liquid-liquid or gas dissolution.